Condenser for refrigerating systems



Sept.. l, 1931. D. F. NEWMAN 19821355 CONDENSER FOR REFRIGERATINGSYSTEMS Filed April 22,'1930 F'Lgl.

Inventor- DeLberft F'. Newman,

f bg Mm HLS AttorneH.

Patented Sept. 1, 1931 4UNITED STATES PATENT 'o1-Fica DELBERT F. NEWMAN,OF SCHENECTADY, NEW YORK, ASSIGNOR TO GENERAL ELECTRIC Y i COMPANY, ACORPORATION OF NEW YORK CONDENSER FOR REFRIGERATING SYSTEMS Applicationled April 22, 1930. Serial No. 446,388.

l My invention relates to condensers for refrigerating systems.

In manufacturing condensers for refrig-` erating systems it is oftendesirable to ob- 5 tain a comparatively large cooling surface for thecondenser in a compact space. One

way of accomplishing this is to provide several conduits arranged inclosely spaced relation, but this has been quite difficult to carry outin prior constructions because the supports for retaining the conduitsin the desired relation made it inconvenient to assemble theconstruction. I

The object of my invention is to provide 'a condenser including aplurality of conduits, in which the refrigerant is condensed, of suchconstruction that the conduits can be readily arranged and supported. inthe desired spaced relation. I accomplish this by providing a condenserincludmga plurality of conduits and supports, whlch are spaced apartthroughout their length, and which embrace groups of the conduits andretain them in spaced relation.

My invention will be more fully set forth in the following descriptionreferring to the accompanying drawings, and the features of noveltywhich characterize my invention will be pointed out with particular- 80ity in the claims annexed to and forming a part of this specication.

In the drawings, Fig.- 1 is a front elevation of a compressionrefrigerating machine, .A partly Abroken away, having a condenserconstructed 'in accordance with my inventi-on; Fig...-is".'-`ai,.fdetail view showing the construction of the slotted finswhich I employ for supporting the condenser; Fig.- 3 is a fragmentaryperspective View of the 40 fins and condenser conduits, and Fig. 4 is afront elevation of a refrigerator cabinet which .is cooled by arefrigerating machine having my improved condenser.

Referring to the drawings, I have shown my invention in connection witha refrigerating machine of the compression type having a compressioncasing 10 in which a motor and compressor unit is mounted.- A pluralityof radially arranffed cooling fins 11 are attached to the cas1ng,and acondenser 12 is secured to the fins and arranged in spaced relation tothe casing. The casing 10 receives the compressed refrigerant directlyfrom the compressor arranged therein, and the compressed gas passes fromthe casing to the condenser through a connection 13. lRaising thepressure of the refrigerant in the casing 10 raises its temperature andwarms the casing, and the arrangement of the condenser'12 is such as toinduce sufficient upward iow of air between the condenser and the casingand through the coils of the condenser to cool the condenser and casing.Heat is transmitted from the condenser and the casing to the air fiowingadjacent to them by. direct Contact therewith and by conduction throughthe fins 11. This refrigerating machine is associated with arefrigerator cabinet 14 having an evaporatorv 15 therein,'and thegeneral construction of the refrigerating machine is like that shown inPatent No. 1,736,635, granted November 19, 1929, on the application ofChristian Steenstrup, to the assignee of the present invention.Thecompressed refrigerant is cooled in the condenser 12, so that it iscondensed and flows y' to a float valve 16 which controls the flow ofliquid refrigerant from the condenser to the evaporator 1'5. The desiredtemperature is maintained in the cabinet 14 by stopping and starting themotor in the compression casing l0 in response to variations in thetemperature of the evaporator 15, and a control ldevice 17 is providedwhich is connected in the motor circuit and is provided with athermostatically controlled switch having a thermostatic element incontact with the evaporator 15. In accordance with my invention thecondenser" 12 is made of a plurality of conduits having supports spaced'apart throughout their length for embracing the groupsof conduits andretaining them'in spaced relation. In the construction disclosed theseconduits are made'of three separate coils of pipeV 18, 19 and 2O whichsurround the casing 1() and are spaced .therefrom in such relation as'to linduce sufficient flow of upward air between the coils and the caseand over the coils to cool them. These separate coils are connectedtogether at opposite ends thereof by fittings 213 and 22, so that thecompressed gaseous refrigerant iows from the casing and through thecoils. In order to provide a simple and convenient construction forsupporting these coils in the desired spaced relation, the coils aremade of three different sizes of pipe, the outer coil 18 being made ofthe largest pipe and the-inner coil 20 being made of the smallest pipe.The ns 11 are provided with radially' arv ranged slots 22 which formoutwardly extending fingers or supports 23 spaced apart throughout theirlength. The bottoms of the slots are made to t the smallest pipe 20, asindicated at 24, are widened at 25 at their mid-portion to fit theintermediate pipe 19,` and further widened at the mouth thereof to fitthe largest pipe 18 at 26. By this arrangement when'the pipes 18, 19 and20 are wound about the case 10.in the slots forming the supports 23, thepipe 2O fits in the bottom of the slot as indicated at 24, the pipe 19fits the shoulder in the slot at 25, and the pipe 18 fits the shoulder26in the mouth of the slot, so that the coils of the pipes 18, 19 and 20are retained in the desired spaced relation. This construction has theadvantage that the three separate coils 18, 19 and 20 can besimultaneously wound upon the fins 11 to complete the con denser. Afterthe coils 18, 19 and 20 are wound in place, it is apparent that they maybe connected together at adjacent ends thereof, as above described, orif desired, they may be connected in series to provide for the flow ofrefrigerant therethrough.

Although I have described a particular form of my invention inconnection with a compression refrigerating machine, I do not desire tobe limited thereto, and I intend in the appended claims to cover allmodifications. which do not depart from the spirit and scope of myinvention.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is:

1. A condenser for refrigerating systems including a sup1 ort having anopen slot varying in widt and coils of different sizes each having aplurality of turns andengaging the side walls of said slot to retainthem in spaced relation.

2. A condenser for refrigerating systems including fins having outwardlypresented open slots decreasing in width from the open end toward theclosed end thereof, and a plurality of coils o f pipe of different sizearranged in said slots and engaging the sides thereof to retain thecoils in spaced relation.

3. A condenser for refrigerating systems including ns having outwardlypresented open slots decreasing in width from the' open end toward theclosed end thereof, and a plurality of coils of pipe of different sizearranged in said slots and engaging the sides thereof to retain thecoilsin vspaced relation, said coils of pipe being connected together atthe ends thereof to provide'for the parallel How of refrigeranttherethrough.

4. A condenser for refrigerating systems including a casing having finssecured thereto, said fins having open slots lvarying in width, andcoils each having a plurality of turns in said slots and engaging theside walls of said slots to retain the turns of each coil in spacedrelation.

5. A condenser for refrigerating systems including a cylindrical supporthaving fins secured thereto, said fins having radially extending openslots varying in width, a plurality of coils of pipe of different sizearranged about said support, said coils being arranged in the same slotsand engaging the sides thereof at different depths tol retain the coilsin spaced relation.

6. A condenser for refrigerating systems including a. cylindricalsupport having fins secured thereto, said fins having radially eX-tending open slots varying in width, a plurality of coils of pipe ofdifferent size arranged about said support, said coils being arranged inthe same slots and engaging the sides thereof at different depths torctain the coils in spaced relation, said coils being connected togetherat the ends thereof to provide for the parallel flow of refrig eranttherethrough.

In witness whereof, I have hereunto set my hand this 10th day of April,1930.

DELBERT F. NEWMAN.

